Answer: pledger

AnswerCrossword Clue
PLEDGERFraternity bidder.
PLEDGEROne joining a toast
PLEDGEROne who gives collateral
PLEDGEROne showing promise?
PLEDGERTelethon participant
pledgerone who pledges something, also PLEDGEOR, PLEDGOR
pledgerto promise
pledgerto bind by pledge
pledgersolemn promise
pledgersomething delivered as security on a loan
pledgerto give as a pledge